The Marble Boat (pinyin: Shi Fang), also known as the Boat of Purity and Ease (Qing Yan Fang) is a lakeside pavilion on the grounds of the Summer Palace. It was first erected in 1755 during the reign of the Qianlong Emperor. The original pavilion was made from a base of large stone blocks which supported a wooden superstructure done in a traditional Chinese design. The Summer Palace (Yiheyuan) was originally created during the Ming Dynasty, but was designed in its current form by Qing emperor Qianlong (r. 1736 - 1795). It is however Qianlongs mother, the Qing Dowager Empress Cixi who is most irrevocably linked to the palace, since she had it restored twice during her reign, once in 1860 after it was plundered by British and French troops during the Second Opium War, and again in 1902 when foreign troops sought reprisals for the Boxer Rebellion, an anti-Christian movement.